/* Special Widgets Stylesheet for AI Literacy course */

.matrix-widget {
  background: var(--paper-deep);
  padding: 24px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
}
.matrix-header h3 {
  margin: 0 0 8px 0;
  color: var(--ink);
  font-family: var(--font-display);
}
.matrix-header p {
  margin: 0 0 16px 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.matrix-instructions {
  font-size: 0.85rem;
  color: var(--muted);
  background: var(--soft);
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 20px;
  border-left: 4px solid var(--teal);
}
.matrix-board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
@media (max-width: 768px) {
  .matrix-board {
    grid-template-columns: 1fr;
  }
}
.matrix-bank {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
}
.matrix-bank h4 {
  margin: 0 0 12px 0;
  font-size: 1rem;
  color: var(--ink);
}
.matrix-cards-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
}
.matrix-card {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.9rem;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.2s ease;
  user-select: none;
}
.matrix-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  border-color: var(--teal);
}
.matrix-card.selected {
  border-color: var(--saffron);
  background: #fffbeb;
  box-shadow: 0 0 0 2px var(--saffron);
}
.matrix-card.dragging {
  opacity: 0.5;
}
.drag-handle {
  color: var(--muted);
  font-weight: bold;
  cursor: grab;
}
.matrix-zones {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.matrix-zone {
  background: var(--white);
  border: 2px dashed var(--line);
  border-radius: 12px;
  padding: 16px;
  transition: all 0.2s ease;
  cursor: pointer;
}
.matrix-zone.dragover {
  border-color: var(--teal);
  background: #f0f9ff;
}
.zone-header {
  margin-bottom: 12px;
}
.zone-badge {
  display: inline-block;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 8px;
  border-radius: 99px;
  margin-bottom: 4px;
}
.badge-high { background: #e0f2fe; color: #0369a1; }
.badge-medium { background: #fef3c7; color: #b45309; }
.badge-low { background: #ffe4e6; color: #b91c1c; }

.zone-header p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}
.zone-content {
  min-height: 50px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.zone-placeholder {
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
  text-align: center;
  padding: 15px;
}
.matrix-controls {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}
.matrix-btn {
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}
.btn-reset {
  background: var(--soft);
  color: var(--ink);
}
.btn-reset:hover {
  background: var(--line);
}
.btn-verify {
  background: var(--teal);
  color: var(--white);
}
.btn-verify:hover:not(:disabled) {
  filter: brightness(1.1);
}
.btn-verify:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.matrix-feedback {
  margin-top: 20px;
  padding: 16px;
  border-radius: 10px;
  font-size: 0.95rem;
}
.matrix-feedback.correct {
  background: #ecfdf5;
  border-left: 5px solid var(--success);
  color: #065f46;
}
.matrix-feedback.wrong {
  background: #fdf2f2;
  border-left: 5px solid var(--coral);
  color: #991b1b;
}
.correct-border {
  border-color: #10b981 !important;
  background: #f0fdf4 !important;
  box-shadow: 0 0 0 2px #10b981 !important;
}
.wrong-border {
  border-color: #ef4444 !important;
  background: #fef2f2 !important;
  box-shadow: 0 0 0 2px #ef4444 !important;
}
.matrix-explanations-list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.explanation-item {
  text-align: left;
}
.explanation-item strong {
  color: var(--ink);
  font-size: 0.9rem;
}
.ex-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: bold;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}
.ex-badge.high { background: #e0f2fe; color: #0369a1; }
.ex-badge.medium { background: #fef3c7; color: #b45309; }
.ex-badge.low { background: #ffe4e6; color: #b91c1c; }
.explanation-item p {
  margin: 4px 0 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}